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Wire Width Dependence of Threshold Current Density for Domain Wall Motion in Co/Ni Nanowires

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10 Author(s)
Tomohiro Koyama ; Inst. for Chem. Res., Kyoto Univ., Kyoto, Japan ; Daichi Chiba ; Kohei Ueda ; Hironobu Tanigawa
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The authors have investigated wire width dependence of threshold current density for current-induced magnetic domain wall (DW) motion in perpendicularly magnetized Co/Ni nanowires. Threshold current density decreased with reducing the wire width, and the lowest threshold value of 1.6×1011 A/m2 was observed at the narrowest width of 36 nm. The micromagnetic simulation shows that the observed width dependence of threshold current density can be understood by the adiabatic spin transfer model.

Published in:

IEEE Transactions on Magnetics  (Volume:47 ,  Issue: 10 )